Recent content by gochaka

I don't even know where to start from

Problem 5. A copper ring of cross-section S = 1 mm2 and radius r = 5 cm starts rotating around its axis with a constant angular acceleration α = 1000 rad/s2 . Find the magnetic field B at the centre of the ring. The resistivity of copper is ρ = 1.68 × 10−8 Ωm. Hint: You may want to work in the...

There isn't an external magnetic field. The material of which there ring is made of the doesn't matter. You only know it's resistance . Also there surely is an induced EMF since this question was used in a very prestigious competition four years ago.

[Thread moved from the technical forums to the schoolwork forums] Let's suppose we have a ring with radias R and radius of the cross section r. We start rotating with an angular velosity w. We will there be an induced EMF in the ring and how can i find it's value?